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e5540 dw-0 : Driver Errot
That is what support assist says. but both the hdd and ssd disk are accesible with widows explorer. But i have an unknown device location PCI Root Complex. And I can't boot from the ssd card on the motherboard where my windows is. So I have installed an old 5200 rpm hdd so i can start win 10, but i want to start from the ssd. Furthermore windows says there are no batteries. A lot of problems and I would be really happy if I could reset the e5540 to the status it had when it left the factory. Obviously with win 8 but upgrading to 10 is not a problem. The problem is to create an e5540 with no problems. And a warning. This is not a simple problem. It is a really hard problem and you need to be an expert with real knowledge of e5540, the way BIOS A24 handles nvram info and the peculiar way the ssd is attached to io.
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Posted October 3rd, 2026 23:37
Hi
One of these?
Latitude E5540
I feel this is worthy of mention...
Boot Sequence allows you to bypass the System Setup‐defined boot device order and boot directly to a specific device (for example: optical drive or hard drive). During the Power-on Self Test (POST), when the Dell logo appears, you can:
- Access System Setup by pressing <F2> key
- Bring up the one-time boot menu by pressing <F12> key
The one-time boot menu displays the devices that you can boot from including the diagnostic option. The boot-menu options are:
- Removable Drive (if available)
- STXXXX Drive (NB: XXX denotes the SATA drive number)
- Optical Drive
- Diagnostics
Such that you can select the mSATA (SSD) and try booting from it, thus double checking the possibility of a damaged/corrupted drive as @ejn63 quite rightly suggests.
If in doubt please ask.
Kind Regards
anne_droid
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Posted October 4th, 2026 09:24
Sorry if i am ungrateful. But did you really read my text? How to use BIOS menues is not the problem. If you know how to reset the e5540, including BIOS configuration and SSD content, i will be happy
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Posted October 4th, 2026 12:20
You can reset the firmware by disconnecting the battery and holding the power button for 30 sec.
You cannot "reset" the SSD. For that you'll need to reinstall Windows onto it. And before you undertake that task, run a full diagnostic on the drive (F12 at powerup to access that).
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Posted October 6th, 2026 15:13
By reset SSD i meant the partitions and the content it has when it is ready to be sold. Furthermore i have tried to explain what a hard problem is. It is a problem that has not been solved by me with 50 years in IT with assistance from gemini, copilot, claude and chatgpt. There are few F2 and F12 options that have not been mentioned and many tried. There are an endless diskpart investigations and boot... commands. Since it all started when the PC died due to empty CMOS battery and the PC become unbootable after I replaced it, all AIs assumed that an incorrectable error in BIOS nvram was the culprit, and they started guessing about work around. In the end copilot realised that the Win 10 installation on the SSD was MBR, legacy boot, and for some reason it was no longer bootable from the SSD. It then suggested to covert it to GPT (mbr2gpt) and try UEFI boot. It did not work, but after correcting the bootfile reference (on the F12 menu) the PC is now up and running.
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Posted October 7th, 2026 22:03
Correction. It was not copilot who found the solution. It was gemini. I think it currently is the best AI for this type of proble8
ejn63
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Posted October 3rd, 2026 21:10
It sounds like the mSATA SSD is bad -- try removing it. That should allow you to install Windows onto the hard drive.